Low-cost science and technology materials examples of National Institutions of Democratic Peoples' Republic of Korea, Peoples Republic of China and Brasilia. - Unesco. Division of Primary Education, Literacy and Adult Education in Rural Areas (Paris Unesco, 1987)
[v.1] At kindergarten level.--[v.2] At the primary level.-- [v.3]. At the senior middle school lower grades level.
Keywords: Teaching -- Aids and devices -- Congresses; Scientific apparatus and instruments -- Construction and design -- Congresses